Punching and shearing machine



(No Model.) 2 Sheets-Sheet l. J. H. STERNBERGH.

PUNGHING AND SHEARING MACHINE. No. 452,855. Patented May 26, 1891.

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J. H. STERNBERGH.

PUNGHING AND SHEARING MACHINE.

No. 452,855. Patented May 26,1891.

UNTTED STATES PATENT OFFICE.

JAMES HERVEY STERN BERGH, OF READING, PENNSYLVANIA.

PUNCHING AND SHEARING MACHINE.

SPECIFICATION forming part of Letters Patent No. 452,855, dated May 26,1891.

Application iiled August 7, 1890. Serial No. 361,313. (No model.)

To aZ whom it' may concern.:

Be it known that I, JAMES I-IERVEY STERN- BERGH, a citizen of the UnitedStates, residing at Reading, in the county of Berks, State ofPennsylvania, have invented certain Improvements in Machines forPunching, Shearing, duc., of which the following is a specification.

This invention relates to machines adapted more especially for workingmalleable metals, such as wrought-iron.

The object is to provide a compact machine, which may be adapted toperform a variety of work-such as punching, shearing, ordieforging-moreexpeditiously and automatically than has heretofore been done; in otherwords, one which will turn out a maximum of `work while requiring aminimum of attendance.

The principle of the invention consists in operating in successioncircular series of punches, knives, or other tools, as the case may be,by means of a central shaft connected therewith by suitable operatingmechanism, each member of a series being arranged to act in turn uponone of anumber of metal bars, which are automatically fed onward aftereach action upon them, thus multiplying the amount of work ordinarilydone at each rotation of the operating-shaftto an extent dependent onthe number of dies or cutters in the series, and at the same time makingthe machine as nearly automatic as pos-` sible in its action, new` barsto be operated upon being merely placed in position, as required. V

The drawings, in connect-ion with the following description, will moreclearly reveal the invention, and its novel features are speciiicallypointed out in the claims.

Figure l is a sectional elevation of a machine embodying the invention.Fig. 2 is a plan view of the same with the cap-piece or cover removed.Fig. 3 is a sectional plan through Y Y vof Fig. 1.` Fig. 4. is aperspective View of a modified tool-carrier or slide. Fig. 5 is apartial plan vlew of the cappiece, showing one of the bar-guidesattached thereto.

The machine as represented consists of a bed-plate G, to which aresecured vertical columns F, arranged to support a circular table orframe A, which carries the dies or cutters, and a central verticaloperating-shaft E, having a bearing at its lower end in the bed-plate Gand near its upper end e2 in the table or frame A. This shaft is rotatedin any convenient manner, as through a gearwheel E', and at its upperend above the bearing e2 is provided with a cam or eccentric C, which isrotated in a cylindrical recess a in the center of the table. From thisrecess slots or slideways a extend radially toward the periphery of thetable. These radial slots ci are adapted to receive and guide toolcarriers or slides to which punches` knives, or dies are secured. In thedrawings the table is represented as having six of these slideways, fourof which are adapted for shearing, two of them being fully arranged forshearing round bars. In the remaining two a mechanism for carryingoutmore complicated operations on the same principle is shown, and willbe described later.

Referring to the shearing mechanism, the tool-carriers or slides B,which are guided in the slideways a', are held in engagement With thecam C by means of pins h', which loosely enter a circular groove c inthe upper surface of the cam while the periphery of the latter bearsupon the rounded inner ends of the slides below their projectingportions bwhich carry the pins. The slides are thus alternately pushedoutward and pulled inward by each rotation of the cam. Fixed knives a2are removably secured to the frame A with their shearing-edges tiltingslightly downward by means of screws a3. The moving knives h are securedto the slides B by means of recessed plates h2 and screws b3. The cappiece or cover D, which is bolted against the upper surface of the tableby means of bolts d, which screw into the tapped holes a7, serves tohold the slides B in their guideways without preventing their freeradial movement and also furnishes a bearing for the extension c of theshaft E.

In working the machine the bars of metal to be punched, sheared, orotherwise operated on are placed vertically above the fixed tools,forming a circular series of parallel bars I I, equal in number to theslides which IOO are used. Adjustable stops, as ff', secured to thecolumns F, may be used to limit the vertical movement of the bars I, thelower ends of which are loosely held by guides V, removably secured tothe table A, while the 'upper portion may be steadied by any suitablemeans. (Notshown.) The continued rotation of the cam C presses the slideB outward, and the bar I is sheared asthe cutters pass each other, thesheared portion passing through the opening a4 in the table into asuitable receptacle, while the main portion of the bar rests upon theknife b until the inward movement of the slide permits it to dropautomatically to the stop f ready to be operated upon at the nextrevolution of the cam.

attendant need only place new bars in posi-l tion, as required. 1

To provide for conveniently and economi-` cally lubricating the machine,I convert the central cylindrical recess a in the table A into anoil-well, which is supplied through an openl ing d in the cover D. Theoil fiows out into the slideways c', but is prevented escaping therefromby suitable packing h6, which is set in grooves 57, extending around theslides, as. shown most clearly in Fig. 4, and a similar packing es stopsits escape around the shaftbearing e2.

It is evident that the functions of different machines may be combinedin one by using slides with different kinds and sizes of tools, or thatthe output of the machine, when adapted exclusively for onekind ofwork,will be much greater than with the ordinary form of machines inwhich each revolution of the shaft performs but one operation, while atthe` same time the attendance required is very limited. As alreadystated, however, my machine. may be adapted to perform more complexoperations than that described, and I have therefore illustrated amechanism for forming nuts orwashers,which shows the applicability of myinvention to operations requiring two or more simultaneous orconsecutive co-operatng movements.

The hollow punch M is secured to a slide B', a portion only of which isshown in Fig.v l, and its outward movement cuts off a portion of metalfrom a bar placed between the punch M and a die L, iixed in the frame ortable A, which die may be provided with a shoulder Z to stop the bar.The portion of metal cutoff is pressed against the die L and againstacrownerN in forminga nut. While Vt-hus held a piercer P is pressedinward through the hollow crowner and punches a hole in the nut-blank,the core going into the hollow main punch IWI, from which it may beexpelled in any ordinary manner. The movement of the piercer P iseffected by means of a lever S, fulcrumed in the jaw formed by arms a5,projecting from the table, the lever Each bar in the series is thusoperated. upon at each :revolution of the shaft and the.

being operated by a grooved cam K on the shaft E, or in any suitablemanner. The piercer having done its work, the punch M and crowner N aresimultaneously moved inward, the latter being operated through the leverR by a cam II on the shaft, and the nut is forced out of the die anddropped into a receptacle.

The projections hand 7L of the cams K and H may be so shaped and setwith relation to each other and the cam C as to effect the severalmovements of the parts in proper co-operative order, and by modifyingthe mechanism as each particular case will readily suggest to an expertthe machine may evidently be adapted to perform a variety of work otherthan that specifically described. By combining a perforating-punch P anda blanking-punch h in the same slide B2, as shown in Fig. 4, twooperations may be effected simultaneously by one movement.

Any convenient number of slides carrying' similar or different tools maybe employed in one machine, thus combining the functions or capacity ofa number of ordinary machines in a single one, and making it possiblefor a single attendant to turn out a much greater product.

Having thus fully revealed my invention and clearly described how thesame may be practically applied, I do not'intend to -limit myself to theexact construction shown; but what I claim is- 1. The combination, witha table or frame, a circular series of fixed dies, and a correspondingseries of radially movable dies adapted to operate in connection withthese fixed dies, of a revoluble shaft carrying cam IOO mechanism withwhich the movable dies are operatively connected, whereby they aresuccessively actuated with a positive inward and outward movement,substantially as set forth.

2. The combination, with a table or frame,

a circular series of fixed dies therein, and a Y' corresponding seriesof radially-movable dies ,adapted to operate in connection with thesefixed dies, of a revoluble shaft carrying cam mechanism with which themovable dies are operatively connected, guides for holding the blanks inposition to be operated upon, and stops for supporting the lower ends ofthe blanks, substantially as set forth.

3. A machine for punching, shearing, the., the table or frame of whichis provided with a cavity or recess adapted to serve as anoilreceptacle, radial slideways leading from this cavity, slides locatedin these ways, a rotary shaft, and a cam thereon Aoperatively connectedwith the slides, substantially as set forth.

L llie combination, with a table or frame, a circular series of iixeddies therein, a series of radially-movable dies located inside of thefixed dies, and one or more movable dies located outside of said fixeddies and adapted IIO to operate in connection therewith, of a revatingmovements thereof in connection with 1o olu ble shaft carrying cammechanism with the ixed die, substantially as set forth.

which the movable dies are operatively oon- In testimony whereof I affixmy signature in neoted, substantially as set forth. presence of twoWitnesses.

5. The combination, with a fixed die L, a A T croWner-die N, movabletherein, and a piercer JAMES HERVEX S PERNIBERGH P, guided Within saidcroWner-die, of a sepa VVitnesseS: rate movable die M and mechanism foroper- H. M. M. RICHARDS, ating said movable dies to produce co-oper-EDWIN L. MASTER.

